Practice:
https://www.mathsisfun.com/data/probability.html
https://www.cut-the-knot.org/probability.shtml
https://brilliant.org/courses/probability/
http://www.analyzemath.com/statistics/probability_questions.html
https://www.khanacademy.org/math/precalculus/prob-comb/basic-prob-precalc/e/probability_1
https://www.khanacademy.org/math/precalculus/prob-comb/independent-events-precalc/e/compound-events
https://www.ixl.com/math/algebra-2/find-conditional-probabilities-using-two-way-frequency-tables
https://www.mathsisfun.com/data/probability-events-conditional.html
Instruction:
https://www.khanacademy.org/math/statistics-probability/probability-library
http://mathforum.org/dr.math/faq/faq.prob.intro.html
http://www.algebra-class.com/examples-of-probability.html
https://learnzillion.com/lesson_plans/5488-calculate-conditional-probabilities-using-a-two-way-table
https://www.youtube.com/watch?v=hhl7qa0ZAhU
https://www.mathbootcamps.com/conditional-probability-notation-calculation/
http://www.probabilityformula.org/conditional-probability-examples.html